A noun in The Etymologies of the 1930s glossed “course” derived from ON. yura under the root ᴹ√YUR “run” (Ety/YUR).
Noldorin
rant
noun. lode, vein
rant
noun. lode, vein
rant
noun. course, riverbed
rath
noun. course, riverbed
rath
noun. street (in a city)
celebrant
place name. Silverlode
celeb(rind)rath
place name. Silverlode
iôr
noun. course
iôr
noun. course
rhib-
verb. to flow like a (torrent ?)
The reading of the gloss is uncertain
siria-
verb. to flow
An earlier name of Celebrant in Lord of the Rings drafts from the 1940s (TI/241), apparently celeb “silver” or celebren “of silver”, combined with rath “course, river-bed”.